Kim Kardashian & Kanye West: Baby on the Way!

The seriousness of their coupledom is making giant step forward, as Kim Kardashian and Kanye West have made quite the year-ending announcement.

The 32-year-old E! reality hottie's rap star beau shared a piece of joyous news on Sunday night (December 30) while letting the crowd at his Atlantic City concert know that he's set to become a first-time daddy.

Shocking everyone - including his famous girlfriend's tight-knit family - Kanye dubbed Kim's knocked up status as the "most amazing thing" as he referred to her as his "baby mom" while speaking to the beyond raucous Ovation Hall audience.

As could be expected, the baby on board revelation was followed by tweets of glee by his lady's mom, as Kris Jenner wrote, "Oh BABY BABY BABY!!"

Meanwhile, Miss Kardashian's sister, Kourtney, added, "Been wanting to shout from the rooftops with joy and now I can! Another angel to welcome to our family. Overwhelmed with excitement!"

To celebrate Kim's big end of the year news, GossipCenter has put together a 2012 Top 12 rundown of the always stylish E! reality star's hottest looks from over the past twelve months.

Check out the mom-to-be in all of her fabulousness below and stay linked to GossipCenter for all of the details as they become available!

Ripped Jeans and a Black Jacket - Kim looked effortlessly chic on December 20 as she headed in to Anastasia Eyebrow Salon for a treatment. She accessorized with a sleek bun and a bright pink handbag.

Leather Peplum Skirt and Black Tank- Out and about on official business, the reality star looked every part the owner of Dash as she and sister Kourtney stopped by the store in Miami on December 12.

Teal Dress- Showing off her famous curves, Kim picked a fitted teal dress for dinner with her man Kanye West at ll Bolognese restaurant in Rome on October 18.

Metallic Skirt and Green Tank- In the market for some new wheels, Kim wore a knee length gold metallic skirt and a green silk tank top to check out Pagani Huyara cars at Prestige Imports in Miami on October 30.

Floor-Length Blue Dress- Glamming things up for a family photo shoot, the middle Kardashian chose a floor length blue stunner with elegant floral cut outs on October 1 in Miami.

Grey Pants with Leather Peplum Top -Heading to the studio on business, the curvy beauty showed off her assets in grey skinny jeans and a fitted leather Peplum top in Miami on October 24.

Orange Top and Beige Pants- Kim looked bright in a cleavage bearing orange top and beige pants as she spent some time with Kanye in New York City on July 29.

Black and White Dress- Turning heads in a fitted black and white dress with cutouts around the neckline, Kim dropped in at the DeJour magazine launch party on September 5 in New York City.

Denim Top with Blue Skirt- On her way in to Webster, Ms. Kardashian looked sexy but demure in a denim oxford shirt and a knee length pencil skit accessorized with white pumps. Miami, October 2.

Fur Coat and Ankle Boots- Across the pond for promotional duties, Kim rocked a dark fur coat and peep toe ankle boots as she left the Dorchester Hotel on November 9.

White Suit Outfit- Joining big sister Kourtney and nephew Mason, Kim suited up in all white for a trip to PriceChoice FoodMarket in Miami on October 26.

Nude Dress- Showing the importance of her faith, Auntie Kim looked gorgeous in a classic nude dress and matching heels as she took Mason to church on August 5 in Agoura Hills, CA.